Alejandra Duarte’s former job at a Worcester industrial laundry facility wasn’t easy. It involved a lot of heavy work — packing and transporting up to 600 pounds on a routine basis. When she became pregnant, she told her supervisor and asked for a lighter workload. Instead, her supervisor increased her workload and hours. Duarte saw her number of 10-hour shifts increase from four to five and was given the additional responsibility of training new workers. “She said I could accept the work as it was or stop working there,” Duarte told the Legislature’s Committee on Labor and Workforce Development during an April hearing, testifying in support of the Pregnant Workers Fairness Act.